Dr. Johannes Nold Profile

Dr. Johannes Nold

at Fraunhofer-IOF

SPIE Involvement:

Author

Publications (27)

Proceedings Article | 12 March 2024 Presentation + Paper

Temperature-dependent fluorescence and site-selective excitation studies of ytterbium doped silica

Brian Topper, Alexander Neumann, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Arash Mafi, Thomas Schreiber

Proceedings Volume 12865, 128650F (2024) https://doi.org/10.1117/12.3000259

KEYWORDS: Absorption, Silica, Fluorescence, Ytterbium, Fiber lasers, Emission wavelengths, Spectroscopy, Glasses

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Proceedings Article | 12 March 2024 Paper

Mitigation of transverse mode instability by polarization rotation in high-power PM fiber amplifiers

Gonzalo Palma-Vega, Denny Hässner, Stefan Kuhn, Johannes Nold, Friedrich Möller, César Jáuregui, Andreas Tünnermann, Jens Limpert, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume 12865, 1286504 (2024) https://doi.org/10.1117/12.3001675

KEYWORDS: Transverse mode instability, Polarization, Fiber amplifiers, Birefringence, Refractive index

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Proceedings Article | 12 March 2024 Paper

High-precision adjustment of the refractive index in high-power laser fibers

Nicoletta Haarlammert, Johannes Nold, Gonzalo Palma-Vega, Stefan Kuhn, Jens Limpert, Thomas Schreiber

Proceedings Volume 12865, 128650G (2024) https://doi.org/10.1117/12.3000567

KEYWORDS: Refractive index, Silica, Manufacturing, Fiber lasers, Structured optical fibers

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Proceedings Article | 12 March 2024 Paper

Polarization-maintaining, ytterbium-doped, rod-type, multicore fiber

Arno Klenke, Moritz Grimm, Cesar Jauregui, Mehran Bahri, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 12865, 128650Z (2024) https://doi.org/10.1117/12.3001761

KEYWORDS: Multicore fiber, Polarization, Birefringence, Design, Oscillators, Photonics, Optical simulations

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Proceedings Article | 12 March 2024 Paper

Extraction of 100-mJ level pulse energy at high repetition rates by a ns-class, 49-core fiber laser

Mehran Bahri, Arno Klenke, Cesar Jauregui, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 12865, 1286505 (2024) https://doi.org/10.1117/12.3002542

KEYWORDS: Multicore fiber, Fiber lasers, Oscillators, Fiber amplifiers, Q switching, Laser applications, Extreme ultraviolet, Pulsed fiber lasers

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Proceedings Article | 23 October 2023 Presentation

Overview and perspectives of fiber laser power scaling

Till Walbaum, Friedrich Möller, Marco Plötner, Maximilian Strecker, Benjamin Yildiz, Johannes Nold, Stefan Kuhn, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume PC12739, PC1273903 (2023) https://doi.org/10.1117/12.2688504

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Proceedings Article | 15 March 2023 Presentation + Paper

Laser cooling silica: current status and future prospects

Brian Topper, Alexander Neumann, Alexander Albrecht, Angel Flores, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume 12437, 1243703 (2023) https://doi.org/10.1117/12.2655228

KEYWORDS: Ytterbium, Silica, Fluorescence, Glasses, Aluminum, Spectroscopy, Emission wavelengths, Air force, Absorption, Temperature metrology

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Proceedings Article | 8 March 2023 Presentation + Paper

Analysis and fabrication of tapered multicore gain fibers for high power lasers

Christopher Aleshire, Albrecht Steinkopff, Arno Klenke, Cesar Jauregui, Steffen Böhme, Tobias Koch, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 12400, 1240013 (2023) https://doi.org/10.1117/12.2650508

KEYWORDS: Multicore fiber, Beam propagation method, High power lasers, Fiber lasers

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Proceedings Article | 8 March 2023 Presentation + Paper

The impact of core size scaling on the transverse mode instability threshold in fiber laser amplifiers

Sobhy Kholaif, Mehran Bahri, Arno Klenke, Cesar Jauregui, Johannes Nold, Nicoletta Haarlammert, Stefan Kuhn, Thomas Schreiber, Jens Limpert

Proceedings Volume 12400, 124000W (2023) https://doi.org/10.1117/12.2651074

KEYWORDS: Transverse mode instability, Fiber lasers, Laser damage threshold, Design and modelling, Beam diameter, Photonic crystal fibers, Photonics, Manufacturing, Thermal optics, Single mode fibers

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Proceedings Article | 8 March 2023 Presentation + Paper

Optical core-to-core crosstalk in rod-type multicore fibers

Albrecht Steinkopff, Christopher Aleshire, Arno Klenke, Cesar Jauregui, Johannes Nold, Stefan Kuhn, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 12400, 124000Z (2023) https://doi.org/10.1117/12.2650040

KEYWORDS: Multicore fiber, Crosstalk, Optical simulations

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Proceedings Article | 8 March 2023 Presentation + Paper

49-core rod-type ytterbium-doped multicore fiber for high power operation

Arno Klenke, Mehran Bahri, Albrecht Steinkopff, Christopher Aleshire, Cesar Jauregui, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 12400, 124000Y (2023) https://doi.org/10.1117/12.2649986

KEYWORDS: Multicore fiber, Femtosecond pulse shaping, Femtosecond phenomena, Beam diameter, Physical coherence, Photonics, Diodes, Coherent beam combination, Beam splitters, Ultrafast phenomena

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Proceedings Article | 9 March 2022 Presentation

Advances in the optical refrigeration of silica: cooling by 18 K from room temperature

Brian Topper, Mostafa Peysokhan, Alexander Albrecht, Angel Flores, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume PC12018, PC1201808 (2022) https://doi.org/10.1117/12.2610103

KEYWORDS: Silica, Optical fibers, Ytterbium, Temperature metrology, Thermometry, Optical amplifiers, Luminescence, High power fiber amplifiers, Glasses, Cameras

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Proceedings Article | 4 March 2022 Presentation + Paper

500 W average power, multicore fiber-based femtosecond CPA system

Arno Klenke, A. Steinkopff, C. Aleshire, C. Jauregui, Stefan Kuhn, Johannes Nold, Christian Hupel, Sigrun Hein, Steffen Schulze, Nicoletta Haarlammert, Thomas Schreiber, Andreas Tünnermann, Jens Limpert

Proceedings Volume 11981, 119810E (2022) https://doi.org/10.1117/12.2609380

KEYWORDS: Femtosecond phenomena, Reflectivity, Fiber amplifiers, Beam splitters, Polarization, Mirrors, Fiber lasers, Wave plates, Laser systems engineering, Structured optical fibers

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Proceedings Article | 4 March 2022 Presentation + Paper

High energy oscillator-amplifier with tapered rod-type multicore fiber

Christopher Aleshire, Albrecht Steinkopff, Maximilian Karst, Arno Klenke, Cesar Jauregui, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 11981, 1198108 (2022) https://doi.org/10.1117/12.2609569

KEYWORDS: High power fiber lasers, Q switched fiber lasers, Fiber lasers, Fiber amplifiers, Optical amplifiers, Q switching, Oscillators, High power fiber amplifiers, Coherent beam combination

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Proceedings Article | 4 March 2022 Presentation

Anti-Stokes fluorescence cooling of ytterbium doped silica glass for radiation-balanced fiber lasers

Proceedings Volume PC11981, PC119810N (2022) https://doi.org/10.1117/12.2615241

KEYWORDS: Fiber lasers, Silica, Ytterbium, Luminescence, Glasses

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Proceedings Article | 4 March 2022 Presentation

Investigations towards easy-to-fabricate effective athermal fibers for high average power lasers

Gonzalo Palma-Vega, Stefan Kuhn, Johannes Nold, Till Walbaum, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume PC11981, PC1198102 (2022) https://doi.org/10.1117/12.2606536

KEYWORDS: Optical fibers, Thermography, Step index fibers, Ytterbium, Thermal effects, Fiber lasers, Fiber amplifiers, Active optics

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Proceedings Article | 9 March 2021 Presentation + Paper

Simplified manufacturing of advanced microstructured fibers for laser applications

G. Palma-Vega, C. Hupel, J. Nold, S. Kuhn, J. Limpert, N. Haarlammert, T. Schreiber

Proceedings Volume 11665, 116651S (2021) https://doi.org/10.1117/12.2577215

KEYWORDS: Manufacturing, Laser applications, Glasses, Cladding, Nanostructuring, Fiber lasers, Refractive index, Photonic crystal fibers, Optical simulations, Nanolithography

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Proceedings Article | 5 March 2021 Presentation

Anti-Stokes fluorescence cooling of a Yb-doped silica glass preform using a high-power laser

Esmaeil Mobini, Saeid Rostami, Mostafa Peysokhan, Alexander Albrecht, Stefan Kuhn, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Angel Flores, Andreas Tünnermann, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume 11702, 1170208 (2021) https://doi.org/10.1117/12.2579925

KEYWORDS: Silica, Glasses, Luminescence, High power lasers, Optical fibers, Optical amplifiers, High power fiber amplifiers, Absorption, High power fiber lasers, Fiber lasers

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Proceedings Article | 9 March 2020 Presentation

Observation of anti-Stokes fluorescence cooling of ytterbium-doped silica glass (Conference Presentation)

Proceedings Volume 11298, 112980G (2020) https://doi.org/10.1117/12.2545233

KEYWORDS: Luminescence, Silica, Glasses, Fiber amplifiers, Optical amplifiers, Fiber lasers, Laser damage threshold, High power lasers, High power fiber amplifiers, ZBLAN

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Proceedings Article | 21 February 2020 Presentation + Paper

Analysis of fabrication techniques and material systems for kW fibers limited by TMI

Nicoletta Haarlammert, Stefan Kuhn, Christian Hupel, Johannes Nold, Steffen Schulze, Friedrich Möller, Victor Distler, Maximilian Strecker, Gonzalo Palma-Vega, Sigrun Hein, Denny Häßner, Till Walbaum, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann

Proceedings Volume 11260, 1126026 (2020) https://doi.org/10.1117/12.2546714

KEYWORDS: High power fiber amplifiers, Single mode fibers, Cerium, Ytterbium, Optical fibers, Absorption, Doping, Fabrication, Fiber lasers, Aluminum, Refractive index, Signal attenuation, Amplifiers

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Proceedings Article | 7 March 2019 Paper

Single-mode propagation with 205µm mode-field diameter in a passive large pitch fiber

Albrecht Steinkopff, Cesar Jauregui, Fabian Stutzki, Johannes Nold, Christian Hupel, Nicoletta Haarlammert, Jörg Bierlich, Andreas Tünnermann, Jens Limpert

Proceedings Volume 10897, 108970W (2019) https://doi.org/10.1117/12.2509935

KEYWORDS: Structured optical fibers, Wave propagation, Photonics, Optical simulations, Fiber characterization, Photonic crystal fibers, Single mode fibers

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Proceedings Article | 27 February 2019 Paper

High-power fiber laser materials: influence of fabrication methods and codopants on optical properties

S. Kuhn, S. Hein, C. Hupel, J. Nold, F. Stutzki, N. Haarlammert, T. Schreiber, R. Eberhardt, A. Tünnermann

Proceedings Volume 10914, 1091405 (2019) https://doi.org/10.1117/12.2509609

KEYWORDS: Aluminum, Ytterbium, Doping, Signal attenuation, Refractive index, Fabrication, Absorption, Silica, High power fiber lasers, Optical properties

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Proceedings Article | 14 March 2018 Presentation

TMI-threshold investigations of low NA Yb-doped single mode fibers (Conference Presentation)

Franz Beier, Friedrich Möller, Johannes Nold, Bettina Sattler, Stefan Kuhn, Christian Hupel, Sigrun Hein, Andreas Liem, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann

Proceedings Volume 10512, 1051203 (2018) https://doi.org/10.1117/12.2287699

KEYWORDS: Fiber amplifiers, Absorption, Single mode fibers, Thermal effects, Fiber lasers, Solid state lasers, Ytterbium, Manufacturing

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Proceedings Article | 22 February 2018 Paper

Active materials for high-power fiber lasers prepared by all-solution doping technique

Stefan Kuhn, Friedrich Möller, Christian Hupel, Sigrun Hein, Franz Beier, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann

Proceedings Volume 10528, 1052809 (2018) https://doi.org/10.1117/12.2287119

KEYWORDS: Ytterbium, Aluminum, Refractive index, Doping, Absorption, Boron, Luminescence, Signal attenuation, Phosphorus, High power fiber lasers

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Proceedings Article | 20 February 2018 Paper

Fabrication of longitudinally arbitrary shaped fiber tapers

J. Nold, M. Plötner, S. Böhme, B. Sattler, O. deVries, T. Schreiber, R. Eberhardt, A. Tünnermann

Proceedings Volume 10513, 105131N (2018) https://doi.org/10.1117/12.2288188

KEYWORDS: Fiber lasers, Single mode fibers, Refractive index, Optical testing, Quality measurement, Beam quality measurement, Multimode fibers, Tapered optical fibers, Specialty optical fibers

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Proceedings Article | 21 April 2017 Presentation

Single mode low-NA step index Yb-doped fiber design for output powers beyond 4kW (Conference Presentation)

Franz Beier, Fritz Proske, Christian Hupel, Stefan Kuhn, Sigrun Hein, Bettina Sattler, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann

Proceedings Volume 10083, 100830Z (2017) https://doi.org/10.1117/12.2256038

KEYWORDS: Fiber amplifiers, Solid state lasers, Single mode fibers, Manufacturing, Fabrication, Doping, Step index fibers, High power fiber amplifiers, Amplifiers, Fiber lasers

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Proceedings Article | 4 March 2015 Paper

6.8 kW peak power quasi-continuous wave tandem-pumped Ytterbium amplifier at 1071nm

F. Beier, Maximilian Strecker, J. Nold, N. Haarlammert, T. Schreiber, R. Eberhardt, A. Tünnermann

Proceedings Volume 9344, 93441H (2015) https://doi.org/10.1117/12.2076599

KEYWORDS: Fiber amplifiers, Optical amplifiers, Amplifiers, Ytterbium, Continuous wave operation, Cladding, Absorption, Fiber lasers, Mirrors, High power fiber amplifiers

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Showing 5 of 27 publications

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